Tank for a backpack sprayer



FIG. 1 is a perspective view looking downwardly from the right toward the front of a tank for a backpack sprayer in accordance with my design;

FIG. 2 is a perspective view similar to FIG. 1 but looking downwards from the left thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a tank for a backpack sprayer, as shown and described. 